Abductor hallucis

Musculus abductor hallucis

MuscularDeep musclesLegLeft and right

View left in 3D View right in 3D

What it is
Forms the soft medial border of the sole, from the medial process of the calcaneal tuberosity and flexor retinaculum to the medial side of the base of the great toe's proximal phalanx.
Function
Abducts and flexes the great toe and helps support the medial arch.
Size
About 12-14 cm long.
Clinical note
The plantar nerves and vessels pass deep to it - it can compress them in tarsal tunnel syndrome; it is often weak in hallux valgus (bunions).